Abstract: Sparse arrays designed based on fourth-order difference co-array (DCA) can achieve significantly higher uniform degrees-of-freedom (uDOFs). However, most existing fourth-order sparse arrays ...

In this paper, we present some construction methods for punctured binary array/sequence pairs (PBAPs/PBSPs) with ideal/optimal correlation constant using their algebraic counterparts punctured ...

A bewildering array of new structures appeared before the astonished eyes of the first microscopists.

Jeffrey Coolidge / Photodisc / Getty Images What's the Difference? Both fat-soluble and water-soluble vitamins are essential for human health, but the two vitamin types differ in several ways, ...